Plays:
* The American Dream and Me (1968) - A satirical look at the American Dream and its impact on individuals.
* The Ballad of the Sad Cafe (1969) - An adaptation of Carson McCullers' short story.
* The Great American Backstage Musical (1972) - A meta-theatrical comedy about the making of a musical.
* Father's Day (1977) - A dark comedy about a family reunion that turns sour.
* The Diary of Anne Frank (1978) - A revision of the original play by Frances Goodrich and Albert Hackett.
* 1776 (1979) - A musical about the signing of the Declaration of Independence.
Screenplays:
* The Sting (1973) - A critically acclaimed heist film that won Academy Awards for Best Picture, Best Director, and Best Screenplay.
* The Last of Sheila (1973) - A complex murder mystery film.
* The Tenant (1976) - A psychological thriller directed by Roman Polanski.
* The Big Red One (1980) - A war film directed by Samuel Fuller.
* The Electric Horseman (1979) - A Western comedy starring Robert Redford.
Novels:
* The Improvement (1972) - A satirical novel about a businessman who decides to "improve" his life.
* The Animal in the Garden (1974) - A novel about a man who is haunted by his past.
* The Great American Backstage Musical (1974) - A novelization of his play.
Hailey also wrote many other plays, screenplays, and television scripts. He was a versatile and talented writer who was known for his wit, satire, and ability to create complex and memorable characters.